What is your deam application?

I'm looking to create a program that I can sell for a low price to a large number of people. What is an application that everyone would want but doesn't exist? If you could create one program, what would it be?
Thanks

Nice..
Well, few days back two of my friends were arguing on something like this, well i don't know how good the idea is but it surely is nice...

Friend A argued for a software that can read all the type of text, pdf, excel, comic readers (cbr) and all the other reading formats in one software.

Friend B argued back, if you do possibly have that software it will be really large to allow them to edit those files, as you have to have all those features in them.

But A argued back he only want this software to be used in terms of reading only, i.e. to open these files and read and very basic features (if required) nothing else.

I was sitting and listening to both, though both had valid points, but when i saw code block (compiler) which is able to read so many different types of files and is just 20 mb large, i felt maybe it is possible....

It will be cool to have one software to read all readable data files by one...
is there any software like that??

I was sitting and listening to both, though both had valid points, but when i saw code block (compiler) which is able to read so many different types of files and is just 20 mb large, i felt maybe it is possible....

It will be cool to have one software to read all readable data files by one...
is there any software like that??

There is a software that than read and inter-convert huge number of multimedia data types.
You may like that. It's Format Factory.